Thanks Joseph for your valuable comments. Yes camera is fully automatic. I keep on aperture priority mode to get maximum depth of field, other things get automatically adjusted. Yes I prefer MF mode as it gives more freedom of focussing. Earlier I was using MF and close up (flower) selection, but it brings down the aperture size to open it maximum, losing the depth of field. I was advised selecting Aperture priority mode keeping aperture any thing higher than 15 on so. Hope to learn this lens as much as possible before we move on for our field trip for five days tomorrow.
-- Dr. Gurcharan Singh Retired Associate Professor SGTB Khalsa College, University of Delhi, Delhi-110007 Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018. Phone: 011-25518297 Mob: 9810359089 http://www.gurcharanfamily.com/ http://people.du.ac.in/~singhg45/ On Thu, Apr 12, 2012 at 4:04 PM, Gerris2 <[email protected]> wrote: > Dear Dr. Singh, > > Since the lens seems to be heavy, I think using a tripod is indicated to > minimize shaking that occurs when hand holding a camera without image > stabilization. Unless you are solid as a rock steady, blurring of your > image will occur especially at extreme magnification. > > Does your lens require a particular aperture setting so you can use it > fully automatically? > > Are all the settings in place to enable you to use the lens in full > automatic mode? I am not conversant in use of Canon camera being a Nikon > user. However, on my D70 camera body there is a switch to toggle between > manual (M) and autofocus (AF). > > I find reading the manuals for both lens and camera operation invaluable > at times like these in this discussion. > > Best regards, > > Joseph
